metalgaze UK [ˈmɛtɫ̩ˌɡeɪz]US [ˈmɛɾɫ̩ˌɡeɪz] noun1 •A musical genre derived from heavy metal, with minimalist ambient instrumentation and wall of sound effects.SanFran metalgaze band Deafheaven deliver New Bermuda to Casbah on Thursday. — 2015